package com.wyz.filter;

import com.wyz.entity.UserInfo;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
@WebFilter("/*")
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) servletRequest;
        HttpServletResponse resp = (HttpServletResponse) servletResponse;
        String uri = req.getRequestURI();
        System.out.println(uri);
        String uriPath = uri.substring(uri.lastIndexOf("/") + 1);
        if ("register.html".equals(uriPath)||"register".equals(uriPath)||"login".equals(uriPath)||"login.jsp".equals(uriPath)){
            filterChain.doFilter(req,resp);
        }else{
            HttpSession session = req.getSession();
            UserInfo userInfo = (UserInfo)session.getAttribute("userInfo");
            if (userInfo!=null){
                filterChain.doFilter(req,resp);
            }else{
                resp.sendRedirect("login.jsp");
            }
        }
    }
    @Override
    public void destroy() {

    }
}
